Commit 87d749a6 authored by Mario Limonciello's avatar Mario Limonciello Committed by Alex Deucher
Browse files

drm/amd/display: Allow backlight to go below `AMDGPU_DM_DEFAULT_MIN_BACKLIGHT` 

The issue with panel power savings compatibility below
`AMDGPU_DM_DEFAULT_MIN_BACKLIGHT` happens at
`AMDGPU_DM_DEFAULT_MIN_BACKLIGHT` as well.

That issue will be fixed separately, so don't prevent the backlight
brightness from going that low.

Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/amd-gfx/be04226a-a9e3-4a45-a83b-6d263c6557d8@t-8ch.de/T/#m400dee4e2fc61fe9470334d20a7c8c89c9aef44f


Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent d5a29e6a

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+1 −1
Original line number Diff line number Diff line
@@ -4506,7 +4506,7 @@ static void amdgpu_dm_update_backlight_caps(struct amdgpu_display_manager *dm, 
		int spread = caps.max_input_signal - caps.min_input_signal;



		if (caps.max_input_signal > AMDGPU_DM_DEFAULT_MAX_BACKLIGHT ||

		    caps.min_input_signal < AMDGPU_DM_DEFAULT_MIN_BACKLIGHT ||

		    caps.min_input_signal < 0 ||

		    spread > AMDGPU_DM_DEFAULT_MAX_BACKLIGHT ||

		    spread < AMDGPU_DM_MIN_SPREAD) {

			DRM_DEBUG_KMS("DM: Invalid backlight caps: min=%d, max=%d\n",